{"id":"https://openalex.org/keywords/birnessite","display_name":"birnessite","description":"A layered manganese oxide hydroxide mineral studied in mineralogy and geochemistry, including for its reactions with environmental contaminants.","display_name_alternatives":[],"ids":{"openalex":"https://openalex.org/keywords/birnessite","wikidata":"https://www.wikidata.org/wiki/Q3640357"},"primary_topic":{"id":"https://openalex.org/T11740","display_name":"Geochemistry and Elemental Analysis","score":0.2587,"subfield":{"id":"https://openalex.org/subfields/1906","display_name":"Geochemistry and Petrology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11740","display_name":"Geochemistry and Elemental Analysis","score":0.2587,"subfield":{"id":"https://openalex.org/subfields/1906","display_name":"Geochemistry and Petrology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10179","display_name":"Supercapacitor Materials and Fabrication","score":0.0791,"subfield":{"id":"https://openalex.org/subfields/2504","display_name":"Electronic, Optical and Magnetic Materials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":2543,"cited_by_count":92928,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/birnessite","updated_date":"2026-10-22T04:07:25","created_date":"2022-04-12T19:38:12"}
